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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Aries on December, 14 2017
High Precision Live Sky Chart
01h 54m 10s
+15° 49’ 36”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 74.2°
Max altitude: 54.3°
Azimuth: 285.8°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Dec 07 7.86 01h 51m 20s +16° 19’ 09” Aries
2017 Dec 08 7.89 01h 51m 38s +16° 14’ 13” Aries
2017 Dec 09 7.92 01h 51m 59s +16° 09’ 30” Aries
2017 Dec 10 7.95 01h 52m 21s +16° 05’ 03” Aries
2017 Dec 11 7.98 01h 52m 45s +16° 00’ 50” Aries
2017 Dec 12 8.00 01h 53m 11s +15° 56’ 50” Aries
2017 Dec 13 8.03 01h 53m 39s +15° 53’ 05” Aries
2017 Dec 14 8.06 01h 54m 10s +15° 49’ 36” Aries
2017 Dec 15 8.09 01h 54m 42s +15° 46’ 19” Aries
2017 Dec 16 8.11 01h 55m 17s +15° 43’ 18” Aries
2017 Dec 17 8.14 01h 55m 54s +15° 40’ 31” Aries
2017 Dec 18 8.17 01h 56m 31s +15° 37’ 58” Aries
2017 Dec 19 8.19 01h 57m 12s +15° 35’ 39” Aries
2017 Dec 20 8.22 01h 57m 56s +15° 33’ 33” Aries

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23144130
Orbit inclination i 5.52316903°
Perihelion distance q 1.83361451 AU
274,304,827 km
Aphelion distance Q 2.93795207 AU
439,511,374 km
Semi-major axis a 2.38578329 AU
356,908,101 km
Orbital period period 3.6900 years
1,345.9996 days
Date of perihelion transit Tp 2017-Nov-18 08:10:28
2,458,075.8406 JD
Next perihelion transit 2021-Jul-26 08:09
2,459,421.8402 JD
Argument of perihelion peri 145.31451542935°
Longitude of the ascending node node 259.56450542886°
Mean anomaly M 339.84945924639°
Mean motion n 0.26745923°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.